I love semantics. UV could be considered a form of light that attracts fish, unless in the regs they specifically define light as a specific range of wavelengths. Also I wonder how a CO would prove in a court of law that the light actually attracted the fish? As already suggested maybe they spook the fish, or some fish?
Similar with scented artificial eggs or worms which are defined as baits. The fact that an angler uses a scent does not mean it's actually an attractant to fish, have there been double blind studies with specific scents that have proven they attract all fish or specific fish?
Please note; I am not advocating weaseling out of the regulations, I personally play it very straight and adhere to the Regs as closely as I can.